GB1495703A - Nitriding of ferrous metals - Google Patents
Nitriding of ferrous metalsInfo
- Publication number
- GB1495703A GB1495703A GB5751673A GB5751673A GB1495703A GB 1495703 A GB1495703 A GB 1495703A GB 5751673 A GB5751673 A GB 5751673A GB 5751673 A GB5751673 A GB 5751673A GB 1495703 A GB1495703 A GB 1495703A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitriding
- ferrous metals
- hydrogen
- hours
- nitride layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
1495703 Nitriding ferrous metals GKN GROUP SERVICES Ltd 27 Feb 1975 [12 Dec 1973] 57516/73 Headings C7D and C7U Ferrous metal is nitrided in dissociated ammonia, whereby a nitride layer is formed, and is then heated in a reducing atmosphere for not more than 6 hours to remove at least 90% of the nitride layer without causing excessive softening of the treated surface. The preferred reducing atmosphere is hydrogen or a mixture of hydrogen with nitrogen or inert gas. Nitriding may be carried out at 480-560‹C for 16-72 hours.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5751673A GB1495703A (en) | 1973-12-12 | 1973-12-12 | Nitriding of ferrous metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5751673A GB1495703A (en) | 1973-12-12 | 1973-12-12 | Nitriding of ferrous metals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1495703A true GB1495703A (en) | 1977-12-21 |
Family
ID=10479376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5751673A Expired GB1495703A (en) | 1973-12-12 | 1973-12-12 | Nitriding of ferrous metals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1495703A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2507212A1 (en) * | 1981-06-08 | 1982-12-10 | Usui Kokusai Sangyo Kk | STEEL TUBE HAVING A LAYER CURED ON AT LEAST ONE OF ITS SURFACES |
EP0545069A1 (en) * | 1991-12-04 | 1993-06-09 | Leybold Durferrit GmbH | Method of treating steel and refractory metals |
-
1973
- 1973-12-12 GB GB5751673A patent/GB1495703A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2507212A1 (en) * | 1981-06-08 | 1982-12-10 | Usui Kokusai Sangyo Kk | STEEL TUBE HAVING A LAYER CURED ON AT LEAST ONE OF ITS SURFACES |
EP0545069A1 (en) * | 1991-12-04 | 1993-06-09 | Leybold Durferrit GmbH | Method of treating steel and refractory metals |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |